Rock crusher



Patented July.16, 1929.

. "UNITED STA Tess PATE T oFF 1,721,246, ICE.

JOHN nossaar, or Los enemas, canni'onum.

nocx cnusnnn.

'npplicati'on filed February 14, 1928. Serialllo. 254,302.

- working parts, to provide an arrangement of working parts peculiarly adapted to Witlistand the vibration and strain of rapid move-4 ment during operation, with the minimum amount of friction and to simplify and improve upon the construct-ion of rock crushers in other particulars, as will more fully here 'inafter appear. I

Referring to the accompanying drawings vwhich illustrate a" preferred embodiment of the invention, v

Figure 1 is a vertical mid-section of the complete crusher.

Figure 2 is a top view of Fi re 1 partly in section, the plane of section eing indicated by the line 2-2 on Figure 1.

' Figure 3 is a broken side elevation of a portion of Figure 1 looking at.the right side ameter considerably less than the internal diameter of the casing 5, an annular delivery of the latter view.

Referring in detail to the drawings, within an upright cylindrical casing 5 is mounted a gyratory conical crusher head 6, the upward ly directed apex 7 of which is surrounded by a stationary crusher head 8 which encloses a'- feed opening!) and is surmounted bya hopperlO. Y

whereby it is secured to the top flange12 of The lower portionof the conical stationary head 8 is surrounded by a radial flange 11 the casing 5. The fastening means employed for this purpose desirably consist of bolts 13 having nuts 14 on thei'rupper ends which screw downupon washers 15, astrong compression spring 16 being interposed between each washer 15 and the upper surface'of the flange. 11. By screwing down the nut '14 the head 17 of the bolt-is brought up against the under surface of the flange 12 under the desired pressure.

The movable crusher head 6 is securedto the upper end'of an upstanding shaft 20, said head 6 having an attaching shank 21 provided with a bore preferably'somewhat larger than the shaft 20 so that an'annular space filled with the metallic bond 22 consisting of metal poured into place in a molten'eondition may befused to secure shaft 22 to shank 21. To the lower end of shaft 20 is secured a spheroidal .head 23 which is operatively connected with the driven wheel in eccentric relation thereto by means of the wheel flange 25, semi- I circular clam in member 26 and clam in" bolts27. P

The movable crusher head 6 is provided witha downwardlydirected skirt or flange 30 p which is in. outwardly spaced relation to the body portion of said head, thus providing- I per end of a tubular. standard 32 having radial arms 33 whereby it is desirably made integral 'ide as shown in igwith the frame or casing 5. The mounting of the guide 31 upon said standard 32 is accomplished by means of. providin said guide with a peripheral downwardly dlrected flange 35ewhich fits over the top of said standard 32.

The upper end of the flange portion 31 is provided with an'annular shoulder 36 uponwhich the s kirt 30 of the movable crusher head rests atone side at all times.

The standard 32, having an external dispace or passage .37 is provided down which the crushed rock'passes and from the lower end of which it is delivered by the diametrically opposite delivery openings 38, said openings being located at right angles to the belt 39 which drives the wheel 24.- An upwardly arched wall 40 forms thefloor of the annular chamber 37.

in a semicircular head or flange 47 which cooperates with thehearing cap 48 to form a bearing for. the stub shaft 49 of the wheel orpulley 24, bolts .50 being used to clamp said bearing cap to said head 47.

The stationary crushing head 8 is not uni- Near the lower end of thecasing 5 is provided a bearing 45 to support the wheel 24,

for'mlyconical but has a lower crushing-face 50 which is less-inclined than the crushing face 51 which extends upwardly from sa d face 50 to form a continuation of'the stationary crushing surface. Owing to this arran ement of the crushing faces the portion nearest he-apex thereof is-surroundedby'a wider f d" 'assage than is the portion of Said headfiw iu of t e cgishing face of the movable head 6 ch pp te' the t na y.

i the apron 56 in thereto.

crushing surface 50. With this arrangement 7 of crushing surfaces,a slow rotation of the wheel 24 would not result in an effective operation of the crusher because, viewing the parts as shown in Figure 1, undesirably coarse material would escape from the right side of the crushing elements while the proper crushing function was taking place at the left side.

' But by refraining from supplying any rock to the feed hopper until t e motor (not shown) has attained a speed suflicient to rotate the wheel 24 at about 400 revolutions per minute, the movable crusher head 6 is gyrated so rapidly that the rock passing between the crushing surfaces cannot descend by gravity fast enough to escape being crushed by the time it reaches the lower portion of the stationary crusher head.

In order to prevent dust and dirt from entering the bearing for the spheroidal head 23, the lower end of shank 21 is provided with a circular downwardly inclined flange and an apron 56 is secured to the lower edge of said flange and envelops the top of the bearing formed by members 25 and 26.

"I'he parts 25 and 26 are provided with an [externally grooved top 55 to receive a spring retaining rm 57 a to clamp the lower end of place.

'I claim:

1. n a crusher, a yratory crusher head hav' g an upwardly irected apex, the conical portion of said head being terminated by the top of a downwardly directed skirt, said skirt being outwardly spaced with relation to the bod portion of said head, a fixed circular gui e inclosed by said skirt, theexternal diameter of said guide being substantially the sameas the internal diameter of said skirt, a shaft for said head extending downwardly therefrom and means operatively engaging said shaft at a distance below said head to impart a gyratory movement 2. In a crusher, a gyratory crusher head,

said headlbeing provided with a downwardly.

extending tubular shank having around its lower end a downwardl directed flange, a driving shaft within sai shank and pro ectingthere-beneath, a Wheel provided wit an eccentric bearing to which the lower end of said shaft is connected, a circular apron connected with said downwardly directed flange at its to and. with said bearing atits lower edge to lieep dust therefrom, and means for guiding the gyratory movement of said head.

3; In a crusher, a gyratory head having a top surface adapted to receive and distribute material to be crushed, said head having at its lower side a downwardly directed skirt,

said skirt being outwardly spaced with relation to the body portion of said head, a fixed circular guide inclosed by said skirt, a portion of said skirt in all its operative positions overhanging, the top of said guide and being centered thereby,*there being a rolling contact between said guide and sald skirt, an operating shaft for said head extending downwardly therefrom and means operatively on aging said shaft at a distance below said hea to im part a gyratory movement thereto.

4. In a crusher, a gyratory crusher headhaving a top portion adapted to receive material to be crushed, said head being terminated below by the top of a downwardly directed peripheral flange, a stationary circular' guide within said flange, said guide being constructed and arranged positively toprevent lateral shifting of saidhead from its center of gyration, means-to'gyrate said head, a stationary crusher head located above and adapted to cooperate with said gyrator head, a shaft for ing downwardly erefrom, and a driving wheel for gyrating said shaft operatlvely connected therewith 1n an eccentric manner.

In testimony whereof I afiix m signature,

- JOHN B SSABT.

gyIrating said head exten 

